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W. J LYONS, ELECTRIC TELEGRAPH RECEIVING APPARATUS 0F WE SELECTIVE TYPE.

APPLICAI'IUN HLED JUNEZG, i914.

Patented Aug. b, 191%},

WILLIAM JOSEPHILYONS, or 15111311111, IRELAND.

ELECTRIC-TELEGRAPH RECEIVQZNG APPARATUS OF THE SELECTIVE TYPE.

Application filed June 26, 1914. Serial No. 847,431.

Be it known that I, \VILLUu Josnru LroXs, -a' Britain and Ireland, residing at"l)ubli n, Ireland,- have invented Improvements in Electric-Telegraph Receiving Apparatus of the Selective Type, of which the following is a specification.

In the -complete specification for. British Letters Patent No. 10911 of 1912,-and also in my co-pending U. S. application Serial No. 705,560 I have described electric telegraph receiving apparatus of the selective type whe ein the call or other device to be operated only upon the transmission and reception of an electric signal according to a prearranged code, and the means for bringing such call or other device into operation, are controlled by an arm arranged to be moved either directly, or indirectly through a. relay, by the received electric signal, and a surface arranged to be moved at right angles, or substantially so, to that of the motion of the operative end of the arm on the receipt of a signal, and which after being started, continues its motion independently of the arm, the said surface being so formed or constituted in relation to the movement of the arm with respect thereto, that thecall or other device will be operated. only in the event of the said arm avoiding contact with certain parts of the; said surface, wlnch parts the said arm will not touch it moved in accordance with the electric signal to which the apparatus is designcd to respond. i

Apparatus constructed and "operated as described can be used to efi'ect selective operation of a calling device in response to signals of the,t pe consisting of a definite.

number of electric. impulses of' the same duration of activity separated by pro-arnals of the type. consisting of electric impulsesshort and long, as in the Uorsesystem-of a prearranged number, sequence. and rate, and to signalswvlnch might consist of single electric impulses of prearrangedduration of activity.thatistosay,corrcsponding'to a prolonged dash as in the case of wireless transmission, or to a continuous train of predetermined duration; or of combinations of such impulses of prearranged number and sequence, but the call deviced'esigned to be-brought into operation by' 'aparticular signal, will not be Specification of Letters Patent.

subject of the King of Great" Patented Au". 8, 1916.

brought into operation by or during the reception of other electric impulses which, in part. involves the aforesaid particular signal for which the apparatus is arranged.

The. construction and arrangement of the controlling arm and movable surface may be such that when the apparatus is in action, the arm will close an electric circuit during the movement of the surface, so long as the signal being received corresponds to the prearranged code and is not followed within a given time by any other effective impulses; or it may be such that the arm will be prevented from closing an electric circuit during the movement of the surface so long as the signal being received corresponds to the prearranged code and is not followed within a given time by any other efl'ective impulses. For this purpose the arm may, for example, be adapted to form a. contact arm and be arranged to oscillate across an endwise movable surface provided with conducting and insulating material, the part of the surface upon which the arm travels while subject to the electric signal to which 'the apparatus isdesigned to re spond, being arranged lengtlnvise of the surface and composed either of conducting material, or of insulating material, or it may be of insulated nniterial (hereinafter included in the term insulating material) and having adjacent thereto in the one case insulating material and in the other case 'the insulating material, or on to the conducting material. as the case maybe, in

theeventot' a different signal being received.

Now the present invention relates to improve'nicnts in or modifications of apparatus of the kind described in my said former spccilicatiolr whereby a single apparatus provided with a single movablcvarm ar ranged to be moved either directly or indirectly through a relay by the electric signal received, is adapted to selectively respond to any one of two or more special signals or messages and bring about the operation of a bell, or a particular bell, and also it may be an indicator. after the complete receipt of the special signal or message. The apparw tus is also adapted to effect the selective operation of other devices as for example steering gear for balloons, torpedoes, and other bodiesby wireless transmissiom'or to effect the operation of printing telegraphs by wireless or other electric transmission. For this purpose, according to the present invention, the surface arranged to be moved at right angles, or substantially so, to that of the motion of the operative end of the arm on the receipt of a signal is provided with a number of paths or traces formed of insulating and conducting material arranged to correspond to a number of specific signals to which the apparatus is designed to respond the whole being arranged to move relatively to the contact arm beneath fixed contact brushes which are intermittently connected to the arm, upon displacement thereof, in such manner that the apparatus can, by means of the single movable arm respond to any one of the number of specific signals but to no other signals. The paths or traces may be arranged on the periphery of a drum or the like so as to rotate past and bear against relatively stationary contact brushes which are intermittently placed in connection with the single movable arm that is moved in accordance with the signal being received. the said arm and the conducting material in each of the paths or traces being connected to the opposite poles of an electric battery through devices controlling means that determine whether the signal being received shall bring the call or other device into operation or not according as the signal correslimnds to one or other of the specific signals for which the apparatus is designed to respond and is not followed within a predetei'niined period by any other electric'jimpulses corresponding to ,afditferent signal, or does not correspond't-o,any one of such specific signals.

Multiple selective apparatus of the kind set forth can be constriicted"'in various forms.

In the accompanying illustrative drawings, lfigure 1 shows diagramlnatically, in developed plan view, one arrangement of such apparatus. Fig. 2 shows dti'z'igram matically an alternative arrangement and Fig. 3 is a detail view of part thereof.

In this example, (i and b are insulated metal stops for use in starting and stopping the motion of a surface, such asthat of the periphery of a drum, on which they are mounted as described in the-said former specili *ation. i i

c. c are two insulated centrally and circumferentially arranged conducting paths on said surface. Arranged .at opposite sides of the said conducting paths are two, three or more pairs of circumferential paths or traces, three are, shown. viz., (I, (l c, and

r l" f, of pieces of metal 9 suitably disposed to correspond to three different signals to which the apparatus is to respond. The piccesof metal in the two corresponding paths (1, (l are all electrically 'connected together and to a slip ring and brush indicated at It. Similarly for the contacts in' the traces e, c and f, 7' there are slip rings and brushes at [L2 and h respectively. In the example, the traces (l, consist of metal contacts g separated by insulating surfaces these being arranged to correspond to the signal O S on the Morse code. The pieces of metal g in each path or trace may be connected together by forming them of one piece of metal having recesses therein to hold so the pieces of insulating material The two strips of metal constituting the two paths or traces are, in each case, shown connected together by a conductor c, (Z or 0 Similarly, the traces 6,. e consist ofmetal contacts g separated by insulating surfaces arranged to correspond to the signal R M on the Morse code, while the traces f, f consist of metal contacts -and insulating surfaces arranged to correspond to a prolonged signal in the caseof wireless trams mission or, to a continuous train ofwav'es of a predetermined length and representing any desired signal or call.

2", i are two fixed setsof contact brushes so arranged that during the movement of the drum they put the central metal strips 0, c into contact with the circumferential paths (1, c, f; d, e, f, and thus at times, de; pending on the path traced by the end of the movable arm 7', which is subject to the control of the electric impulses received, the said arm either makes electric connection with or avoids connection with, the slip rings h, 11. 1th Inthis example, the means for operating the -all device-or for closing the final circuit. comprises arms Z1, it", It that are normally caused by spring controlled guides In to bear respectively on projecting pins Z, Z, Zi fixed on a shaft I which is caused to rotate when the drum carrying the said traces rotates and thus raises the*"" arms k, L, It, until they respectively reach positions where they close the circuits 7.1 controlling the call or other devices .1 to be selectively operated in a manner that will be readily understood and as explained for example in my said former specification, separate indicators k being provided to show which of the three signals has been received.

121 m or m are electromagnets connected respectively to the brushes it, If, It and ar- 6 ranged between such brushes and one pole" of an electric battery 11- the other pole of 125 which is connected to the movable arm 7'. Each of the said electromagnets on being energized acts to pull the corresponding arm la, 7.1 or k against the action of the. corresponding spring controlled guide 0* and thus cause it to leave the corresponding pro ecting pin D, Z or Z and return to its inoperative and initial position as will be S O S on the Morse code. and does not make connection with any of the metal contacts g in the pair of traces (I, (l on the moving drum. If any other signal is received, or if the signal S O S is immediately followed by other signals, thearm j will be connected through the fixed brushes 2' or 2' to a metal contact piece 7 in the path or trace (Z or (I and thus to the slip ring h so that the electromagnet 'm, will be energized and the lever arm is removed from the pin 1 and returned to its inoperative and initial position without producing a call. The call or other device controlled by the arm 7; will. similarly respond only to a signal corresponding to or R M on the Morse code, and that controlled by the arm is will respond only to a signal consisting of a single prolonged dash of predetermined duration but not for a dash of shorter or longer duration. I

It will be obvious that the alternative methods described in my said former British specification for preventing the final operation of the call or other device. in the event of the arm j deviating from the proper path and thus closing an electric circuit. can be applied to the present method of effecting selectivity for several signals. Fig. 2 shows diagrammatically one of such alternative methods. Fig. ;3 being a view of a flctail thereof hereinafter referred to. In this example. the conducting paths 0, 0, paths or traces 1/. 11. e. and f, f and sets of stationary contacts Z. i are arranged as in Fig. 1 and the traces or paths d, cl, 0, e, and f, f are arranged to correspond as before to the signals S O S, R hi, and a dash of predetermined duration. For operating the call or other device, the slip rings and brushes 71. 71 It are respectively connected to one end of the winding of one or other of three holding-in electromagnets 0, 7) and '1' the other ends of which are connected to one pole, say the positive pole, of an electric battery '11 to which the movable arm j is also connected. The middle points of the said windings are respectively connected to three conducting pieces 8, t, u which are insulated from the drum and may conven icntly be placed outside and independently thereof as shown in Fig. :3. 'v is another conducting piece also insulated from the drum and conveniently placed outside and independently thereof and which is connected to the opposite or negative pole of the battery n. several windings are also respectively con nected to insulated stationary contacts 1, 2 and 3 arranged above movable armature contacts 1 2, and 3 controlled by the holding in electromagnets 0, p, 1, these armature contacts being respectively connected in series with indicating devices 1", 2 and 3" that are collectively connected in circuit with a bell or call device t connected to the same pole of the battery n as the stationary contact 11.

1, '2 and 3 are switches arranged in shunt to the separate portions of the circuits including the indicators 1*, 2" and 3 and bell 4, the said switches being ar'anged to be each tripped or opened by a pin D on the drum D or otherwise, after the due reception of the corresponding signal and to thereby cause the current that normally passes through the contact 1, 1 2, 2 and 3, Wand the switches 1, '2 and 3 to the negative pole of the battery 'n to pass through and start the continuous or other ringing bell 4 or other device and operate the corre sponding indicator 1", 2, or 3*. The working of this arrangement is as follows: On

the reception of the first electric impulse and the consequent movement of the arm 7' and release of the clockwork driven drum 1) in known way the set of contact brushes i on the right are made to momentarily engage the conducting pieces's, t, u and v the number of which will depend on the number of messages for which selectivity is to be arranged. In this case the contact of the brushes i with the said conducting pieces may be made by an insulating projection 5 on the drum acting to lift the set of brushes 1" so as to touch the pieces 8, t. u and w as is shown in Fig. 3. The electric connections being as shown in the diagram, the several holding-in electromagnets 0, 7), 1' will be thus energized and will attract their armatures 1, 2" and 3 and, through the contacts 1, 2, and will complete the circuits of the magnets through the switches 1 ,2, 3 so that the lower halves of the windings of su h magnets will continue to be traversed by a current. During the reception of the subsequent electric impulses, the armj moves backward and forward across the conducting path 0, c and if the circumferential paths (7, (I have their metallic spaces suitably arranged for a particular message, then the sequence and number of the signals or impulses corresponding to this message will be such that during its complete reception, the end of j will not be connected through the brushes i or i? at any time to the corresponding slip ring it. The corresponding The middle points of the thus continue to. be energized and finally after the complete reeeption of the message, it may be arranged that the corresponding switch 1 will be automatically opened, either mechanically or otherwise, and the current through the electro-magnet 0 made to pass to the call hell 4 or other device through its particular indicator 1". A message other than the particular one would, during its reception, necessarily put the end of the arm j throu h the brushes i or if, in connectionwith t 1e electromaguet 0 will slip ring and brush it and thus energize theupper half of the winding of the electromagnet 0, thus neutralizing the action of the magnet and breaking connection be tween eontacts 1,1, thereby putting the apparatus into an inoperative condition. Similar actions will take place in respect of signals orimpulsescorresponding or not to the paths or traces e, eand f, f.

I will be understood that in multiple selective apparatus according to the present invention the end of the arm j need not be arranged to touch the moving'surface of the drum in which case the conducting strips 0, c on thesurface thereof maybe omitted.

"In this case the arm would be arranged to make contact only with the fined brushes i, i alternately, or with two fixed contacts connected to such fixed brushes, inthe same manner in which it makes contact with the con-ductin strips 0, 0 under the action of the signa s-being-received, so that as the drum surface moves under the brushes 2', it, the .end of the arm j moves into definite positions under the control of the electric impulses received and thus substantially executes a prearranged movement relative to the drum surface.

Vhat I claim is: I

'1. Electric. telegraphic receiving apparatus of the kind herein referred to comprising a contact arm adapted to be moved on the receipt of an electric impulse, a-surface arranged to move substantially at right angles to that of the motion of'the operative corres ionds to one or end of said contact arm on the receipt of a signal, a number of paths or traces carried by said surface and formed of insulating and con-ducting material arranged to corre spond to a number of specific signals to which the apparatus is designed to respond and a number of fixed brushes against which said paths or traces move, said brushes bein; a rranged to be intermittently connected 'to the said arm upon displacemel'it thereof whereby the apparatus can,-by means of the single movable arm, respond to any one of a number of specific signals but to no other signals.

Electric telegraphic receiving apparatus of the kind herein referred to coiriprisin; a single contact arm adapted to'be moved on the receipt of a signal, a movable drum, a number of circumferentially arranged paths or traces formed of insulatingand conducting material arranged on said drum so as to correspond, to a number of specific signals to which the apparatus is designed to respond, a set of brushes against which said paths or traces are arranged to bear and rotate,isaid set of brushes being arranged to be intermittently placed in com-- munication with said contact arm, a call or. other responsive device, a source of electric energy to the opposite poles of which said arm and the conducting, material in each 'of the pathsor traces are connected, and devices controlling means for determining. whet-her the signal being received shall bring the call or other device into operationv or not according as the signal other of thosefor which the apparatus is designed to respond or does not cor-respond to. any one of such signals.

Signed at 9 Leicester street, Dublin, Ireland, this' seventeenth day of June, 1914 VILLIAM JOSEPH LYONS.

Vitnesses: Joun F, CLAFFEY, E. L. ADAMS,- Jr. 

